In order to get gas drainage radius of the coal seam on the working face of 18205 working face of Xiegou Mine, assay method of numerical simulation and relative pressure method was put forward, mechanism of extraction radius and gas flow equation in borehole were studied, based on COMSOL numeral simulation software and 18205 working face site practice, pressure monitoring results of coal seam extraction drilling was got. The result showed that pressure of gas measuring hole decreased greatly in gas drainage 30 d and extraction hole 1.0 m, exceeding 51% pressure observation indicator line, numerical simulation results and field measurement results coincided, which showed that COMSOL numerical simulation experimental study is reliable and enabled to study the gas extraction radius of the coal seam.
边小峰1,毕建乙1,张 辉2,吴 琼3. 基于COMSOL的顺层钻孔瓦斯抽采半径技术研究[J]. 煤炭与化工, 2018, 41(5): 92-97.
Bian Xiaofeng1, Bi Jianyi1, Zhang Hui2, Wu Qiong3. Study on gas drainage radius technology based on COMSOL bedding. CCI, 2018, 41(5): 92-97.